Shank-lasting machine



C. C. BLAKE.

SHANK LASTING MACHINE.

APPLICATION mao APR.14. |915.

3 SHEETS `SHEET I.

1,373,410@ Patented Apr. 5, 1921.

wnummmlw "u" F Y C. C. BLAKE..

SHANK LASTING MACHINE.

APPLlcAnoN min APR'.-'14. 1915.

1,373,402. Patented Apr. 5, 192L HINE.

Patented Apr. 5, 192i.

3 SHEETS-SHEET 3.

C. C. BLAKE.

SHANK LASTING NIAC APPLICATION HLED APR meesteres SHANK-LASTING MACHINE.

estates.

Application filed April 14, 1915.

To all @o /Lom it may concern.'

Beit known that CHARLES C. BLAKE, a citizen of the United States, residing at Brookline, in the county ofliorfolk and State of Massachusetts, have invented a new and useful improvement in .Shank-Lasting lviachines, of which the following is a specification.

The present invention relates to the mann ufacturev of shoes.

in the system of making shoes devised by me three operations are required at the present time to last the shoe, namely, forepart fitting, heel seat iitting and shank iitting. Y

The object of the present invention is to produce a shank lasting machine for use in my system of shoe making.

To the accomplishment of this object, and suoli others as may hereinafter appear, the features of the invention relate to certain devices, combinations and arrangements of parts, hereinafter described and then set forth broadly and in detail in the appended claims, which possess advantages which will be apparent to those skilled in the art.

The various features ofthe Vpresent inventionvwill be understood from an inspection of the accompanying drawings illustrating the best form of the invention at present known to the inventor, in which,

Figure i is a side elevation of the lasting machine;

Fig. 2 is a plan;

Fig. 3 is a sectional elevation on the line 3-3, Fig. 2; and

Fig. 4 isa view similar to Fig. 3 showing the position of the parts at the commencement of `tie lasting operation.

T he machine illustrated in the drawings operates upon the shoe after the forepart thereof has been fitted in the machine disclosed in application for Letters Patent of the United States filed by Mark E. F ernald and me April 14, 1915, Serial No. 21,424. The machine last referred to updraws the upper around the forepart, tensions a binder about the forepart of the upper to bind the upper against the edge face of the insole, and closes the jaws of a clamp upon the binder to clamp the tensionedbinder to the shoe. The heel seat of the shoermay then be lasted or the shoe may be presented to the machine illustrated in the drawings Specification of Letters Patent.

Patented Apr. 5, i923..

serial No. 21,425.

prior to the heel seat lasting operation. ln any event the shoe when presented to the machine embodying the features of the present invention has the upper at its forepart held in fitted position against the edge face of the insole by the clamped binder the free sides of which extend along the loose upper at the shank of the shoe. rllhe shoe in this condition is presented to the machine illustrated in the drawings. The operative then spreads cement around the forepart of the shoe between the edge face of the insole and the upper clamped thereto. It is not necessary in securing the upper to the edge face of the insole that the cement be spread over the entire edge of the insole. A small fillet of cement on the margin of the edge of the insole is sufiicient. The operative spreads cement along the edge face on both sides of the insole from the juncture of the shank and heel seat to the point of meeting with the clamped upper at the forepart. The machine then wipes the loose binder upwardly in contact with the upper to stretch the upper and inwardl i to place the stretched upper against the edge face of the insole. The opposite sides of the binder, which constitute the wipers, are .then clamped to the shoe. The shoe with its clamps is then removed from the machine.

By employing a quick drying cement the clamps and binder may soon be removed from the shoe and the shoe presented to the welt sewing machine without waiting for the upper to set on the last, a result heretofore considered impossible. In the illustrated embodiment of the invention a shoe. having the upper at its forepart bound to the edge face ofthe insole by a binder l embraced by a clamp 2, is placedjupon a heel pin 3 (Fig. 1) which enters the socket usually formed in the cone of the last. The pin 8 is formed upon the upper end of a post e which is carried Vby a bracket '5secured to the top of a column 6.

.After positioning the shoe on the pin 3 the first operation consists in spreading the cement, whichfholds the upper in its lasted position, between the clamped .upper and edge face of the insole around the forepart of the shoe and upon the edge face of the insole from the juncture of the shank and heel seat to the point of meeting with the clamped upper. To aid the operative in applying the cement the bracket 5 carries an arm 7 to which is pivoted an electric heater 8 containing a cement or glue pot 9.

In order to last the shank of the shoe the machine employs the free portions of the binder 1, which extend conveniently along the shank of the shoe, as wipers for stretching the upper and wiping the stretched upper against the edgeface of the insole. To this end the free portions of the binder are embraced by the jaws 10 of a clamp (Figs. 2, 3 and 4l). Each jaw is secured to the lower end of a post 11 which is arranged to slide upon a bar 12 between stop pins 13. rlhe posts 11 slide upon the bar 12 when arranged substantially normal to the bar and are cramped upon the bar when they are tipped up on the bar. Each aw 10 is formed of a curved piece of metal which is shaped to lit the curvature at the shank of the shoe. The posts 11 also carry pins 1li arranged to engage the top of the hinder. To close the jaws 10 upon the binder and thus wipe the binder upwardly and in wardly to stretch the upper and place the stretched upper against the edge face of the insole the posts 11 are embraced by a pair of arms 15 (Figs. 2, 3 and si). Each of the arms 15 is pivot-ed at the rear of the machine upon a vertical pin 1G which is carried by a sleeve 1T rotatably.T mounted on a horizontal pin 1S carried by the bracket 5. The arm 15 normally held in an inoperative position by a coiled spring 19 one end of which is connected to the bracket 5 and the other end of which is connected to an arm 20 depending from the sleeve 17. The arms 15 are drawn down from their normal inoperative position and positioned against the posts 11 by the operative.

The armsl are then operated to close the jaws 10 upon the binder by a pair of bell crank levers 21 which are arranged upon opposite sides of the machine in position to engage the arms 15. rl`he hubs of the bell crank levers 21 are pivoted upon horizontal rods 22 carried by a plate 23 secured to the bracket 5. T he lower arms of the bell crank levers 21 are crossed (Fig. 3) and are each connected to the upper end of a vertical rod 24 which is secured at its lower end to a horizontal rod 25 carried by a treadle 26 pivoted on a bracket 27 secured to the column 6. The levers `21 are operated through the treadle 26 against the tension of a spring 28 1) which restores the parts to their original position when the pressure on the treadle is removed.

liith this construction pressure upon the treadle operates the bell crank levers 21 to move the arms 15 inwardly. Inward movement of the arms 15 closes the jaws 10 of the clamp upon `the binder which moves upwardly to stretch the upper and inwardly to place the stretched upper against the ing operation.

edge face of the insole. lVhen inward move ment of the binder is limited by the insole the posts 11 tip upon the bar 12 and thus become cramped upon the bar. The treadle 26 is now released and the arms 15 disengaged from beneath the bar 12. As the arms 15 return to inoperative position under the influence of the springs 19 a corner 29 (Fifr. 2) formed on the back of each of the arms 15 strikes a plate 30 on the bracket 5 and turns the arm 15 about the pin 1G until an edge 31 on the arm rests against the plate 30. This construction insures the return of the arms 15 Vto afuniform inoperative position.

The shoe with the binder and the clamps may now'be removed from the` machine. Trleretofore in making a welt shoe of the Goodyear type it has been necessary to delay the passage of the lasted shoe to the welt sewing machine until the upper has set on the last. This delay is necessary owing to the use of lasting tacks which must bereinoved from the shoe before the welt can be sewn thereon. The tacks can only be removed, however, after the lasted upper is set on the last otherwise the lasted upper would snift or contract on the last as soon as it was released by the tacks. By securing the lasted upperwith cement the lasted shoe may be presented to the sewing machine rit-hout waiting for the upper to become set on the last. Obviously, fewer lasts are required to operate a factory at its full capacity when it is not necessary to accumulate the shoes in process before performing an operation thereon than when the shoes in process have to wait some time before they are in condition for the succeed A reduction of the number of lasts needed for acertain output reduces the capital investment of the shoe manufacturer thereby permitting himto effect a considerable saving in the cost of his shoes.

While the primary object of the present invention is directed to a narrow held in the art of lasting shoes it is not to be understood as limiting the scope of the claims, where the context -rotherwise permits, to a shank lasting machine as it will be apparent to.

those skilled in the art that certain features and combinations of parts hereinbefore described are well adapted for general use in lasting shoes.

Bv lasting I mean the drawing or straining of the upper on the shaping sur- I face of the last to fit the upper thereto and the securing of the fitted upper to the insole. By securing I mean the fastening of the upper to the insole by a securing means that performs its securing function byy engagement both with the upper and insole.

1t willbe clear to those skilled in this class of machines 'and with the general objects ofthe present invention in view, that changes maybe made in the details of strucllO ture, the described andillustrated embodiment thereof being intended as an eXploitation of its underlying essentials, the features whereof are definitely stated in their true scope in the claims herewith.

lVhat is claimed as new, is c l. A lasting machine, having, in combination, a wiper, and means for operating the wiper to wipe the upperl into lasted position against the edge face of the insole, substantially as described.

2. A lasting machine, having', in combination, a wiper, means for operating the wiper to wipe the upper against the edge :tace of the insole, and means for fastening the wiper to the shoe to bind the upper against the edge face of the insole, substantially as described.

3. A lasting machine, having, 'in combination, wipers arranged on opposite sides of the shank of the shoe, and means for operating the wipers to wipe the upper into lasted position against the edge face of the. insole, substantially as described.

4. A lasting machine, having, in combination, wipers arranged on opposite sides of the shank of the shoe, means for operating the wipers to wipe the upper against the edge face of the insole, and means for fastening the wipers to the shoe to bind the upper against the edge face of the insole, substantially as described.

5. A lasting machine, having, in combination, devices arranged at the opposite sides of the shoe for engaging the upper, and means for actuating said devices both upwardly and inwardly to stretch the upper and position the stretched upper against the edge face of the insole, substantially as described.

6. A lasting machine, having, in combination, devices arranged at the opposite sides or the shoe for engaging the upper, a clamp provided with jaws arranged to embrace said devices, and means for closing the jaws of the clamp and actuating said devices to stretch the upper and clamp the stretched upper against the edge tace of the insole, substantially as described.

7. A lasting' machine, having, in combination, devices arranged at the opposite sides of the shoe for engaging the upper, a clamp provided with jaws arranged to embrace said devices, means for closing the jaws of the clamp and actuating said devices to stretch the upper and clamp the stretched upper against the edge face of the insole comprising a pair of arms arranged to embrace the jaws of the clamp and a pair of' actuators arranged to embrace the arms,

substantially as described.

8. A lasting machine, having, in combination, devices arranged at the opposite sides of the shoe for engaging the upper, a clamp provided with jaws arranged to embrace said devices, means for closing the jaws of the clamp and actuating said Adevices to stretch the upper and clamp the stretched upper against the edge vface of the insole comprising a pair of arms arranged to embrace the jaws of the clamp, a pair of actuators arranged to` embrace the arms, and means for operating the actuators, substantially as described.

9. A lasting machine, having, in combination, means for supporting a shoe having its forepart bound in itted position by a binder, and `means ior closing the loose ends of the binder on the opposite sides of the shoe at the shank thereof, substantially as described.

l0. A shank lasting machine, having, in combination, means for supporting a shoe for free pivotal movement about a vertical axis and means for simultaneously lasting both sides of the shank, substantially as de scribed.

11. A clamp for use in lasting machines,

having, in combination, a vbar provided with posts constructed and arranged to become cramped on the bar and a plate carried by each post constructed and arranged to conform the upper to the curvature of the insole, substantially as described.

12. A clamp for use in lasting machines, having, in combination, a bar provided with posts arranged to embrace a binder for binding the upper or" a shoe in fitted posi tion, and a plate carried by "each post constructed and arranged to conform the binder and the upper engaged thereby to the curvature of the insole, substantially as described. Y

13. A lasting machine, having, in combination, means for stretching an upper and placing the rstretched upper againstI `the edge face of the insole, and means for securing the stretched upper to the insole at the shank thereof, substantially as described.

let. A clamp for use in lasting machines, having, in combination, a bar provided with posts, constructed and arranged to: become cramped on the bar and a plate carried by each post constructed and arranged to conform the upper to the curvature of the insole, said posts being normally arranged to loosely'embrace the shoe, and means for ac tuating the posts to last the upper, substantially as described.

l5. A lasting machine, having, in combination, a support extending transversely of the shoe provided with lasting devices normally arranged to loosely engage the upper upon opposite sides of the shoe, and means ior actuating said devicesto bring the upper into lasted position, substantially as de scribed.

16. A lasting machine, having, in combination, a support extending transversely of the slice provided with lasting devices normally arranged to loosely engage the upper upon opposite sides of the shoe, and meansl for actuating said devices to last the upper against the edge face of lthe insole and lock said devices in lasted position upon the support, substantially as described.

17. In a lasting machine, a support leX- tending transversely of the shoe provided with lasting devices constructed and arranged to conform the upper to the curvature of the edge face only et' the sole at the shank thereof. i i i 18. A lasting machine, having, in combination, a support extending transversely oi' the shoe provided with lasting devices constructed and arranged to conform the upper to the curvature Aof the edge face only of the sole at the shank thereof, and means for actuating said devices to bring the upper into lasted position.

19. A lasting machine, having, in combination, a support extending transversely oi:l

the shoe provided with lasting devices constructed and ar 'anged to .conform the up' per to the curvature of the edge face only of the sole'at the shank thereof, and means for actuating said devices to last the upper against the edge face of the insole and lock said devices in lasted position upon the support.

20. A lasting machine, having, in combination, means for supporting a shoe having its'iforepart bound in fitted position, and means vfor simultaneously lasting the opposite sides oit theshoe to the edge face only of the insole at the shank thereof.

2l. A machine for lasting uppers of Welt shoes ou lasts having insoles thereon, having, in combination, a Work support, and

means for lasting the upper in iinal lasted position to the edge tace 'of the insole.

22. A machine for lasting uppers of weltshoes on lasts having insoles thereon, having, in combination, means for fitting the upper on the shaping surface of the last, and means for securing the i'itted upper in linal lasted position to the edge face of the insole on the bottom of the last.V Y A CHARLES C. BLAKE. 

